In LAMP stack you need to have a thorough knowledge of JavaScript, PHP or Python whereas in MEAN stack the only knowledge of language you require is JavaScript. JavaScript was and still is, the mainstream scripting language that runs on the client side (browser) and makes the web page dynamic and responsive. The fact that only one language is required in the MEAN stack, it becomes a lot easier for developers to manage the front end as well as the backend. This reason alone is enough that companies should prefer a MEAN stack over LAMP stack. Some of the advantages of using MEAN stack are listed below.

Advantages of Mean Stack:

Mongo DB is built for the Cloud:

MEAN stack offers a compelling database layer in terms of MongoDB. Plug in MongoDB and it spreads across your cluster of servers to offer failover support and automatic replication. Using MongoDB you can easily develop, test and host apps on the cloud, thus, making it a preferred choice for pennies-per-CPU usage.

Cost efficient:

In MEAN stack you require developers who are expert in only one language i.e. “JavaScript”, but as compared to LAMP stack you require developers who are proficient in JavaScript, MySQL and PHP. In terms of relational Database the JOIN command is a revelation, we could save the disk space by removing repeated fields like city, state and ZIP code. This saves a lot of extra space that can be allocated for other resources.

MongoDB vs MySQL:

MongoDB strength lies in the relational Database as compared to MySQL. In MySQL, when we use relational database it feels a bit imprisoning at times as it forces to push the data in tables. This system works when every single entry fits into every single format, but fails miserably when this doesn’t happen.
On the other hand, MongoDB offers a document structure which is more flexible. So, if you want to add some new field then simply add the field to the form, roll it up with the rest of Data in a JSON document, and put it into the MongDB collection. This is great for projects in flux and for dealing with dynamic data which is difficult to constraint in a table form.

MEAN stack uses JSON:

AngularJS, MongoDB, NodeJS and ExpressJS all use JSON. Thus the Data flows neatly among all the layers without rewriting or reformatting. Although in LAMP stack, the PHP has code to import MySQL data and makes the process easy but that doesn’t help the client layer. Whereas in MEAN stack it uses the same JSON format for data, on client layer as well as on backend layer thus, making the process much simpler. JSON’s ubiquity through the MEAN stack makes working with external APIs that much easier: GET, manipulate, present, POST, and store all with one format.

Node.js simplifies the server layer and is super-fast:

Due to the various layers of LAMP it becomes difficult to navigate through them and also shuffling through various config files with differing syntax is another uphill task. On the other hand, with NodeJS, if you want to change the logic used to answer queries, change your app routes requests then all you need is to use JavaScript. Having everything in one layer means less confusion and less chance of bugs created by unnecessary interactions between multiple layers.